
05-07-2025 12:38
Åge OterhalsI found this pyrenomycetous fungi in pine forest o

04-07-2025 20:12
Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33
Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00
Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43
me mandan el material seco de Galicia (España)

03-07-2025 18:40
me mandas el material seco de Galicia (España) re

03-07-2025 20:08

I found this interesting yellowish asco growing on

01-07-2025 23:37
Hello.A Pleosporal symbiotic organism located and

02-07-2025 17:26
Yanick BOULANGERBonjourRécolté sur une brindille au fond d'un fo
this was found in the same place as the Orbilia, on the remains of a dead leaf by a stream. Oak, Sycamore and Hazel were present. The fruit bodies were on both sides of the leaf, and after soaking in water were up to 0.3 mm diameter. They were hardly immersed, rather attached by tiny "rhizoids", upo to 0.5 mmm long. The neck was between 0.25 and 0.35 long. What I assumed to be spores were in fact asci, containing very thin spores up to 25 x 1.5 um. I suspect this is Gnomonia gnomon, but my microscope is unable to show convincingly a central septum in the spores, nor appendages at the ends. Could this be anything else?
Many thanks if this find could be confirmed,
Steve

Chris
Gnomonia alni-viridis 7
Gnomonia cerastis 6
Gnomonia leptostyla 2
Most of these are on Acer.
(Most of these are also yours Chris)
Many thanks Chris and Paul
Dear Steve,
As Paulm said, you'll have to go in Sogonov & al., and then in more recent works. The three taxa Gnomonia alni-viridis Gnomonia cerastis Gnomonia leptostyla aren't used yet today.
Alain
It's hard to know what to do with all the "old" records - we don't really know what many of them would be named as nowadays.
Les petits champignons! Les noms, ils se change si vite!
Steve

the leaf looks like of type of a hazel. Ascus's morphology (apical annulus is ca 1 micrometre), 27-31 x 4.6-6 micrones, spore 20 x 1.5 micr fits well in the description of Monod (1983: 85).
Important: Check the perithecia, if they collapse circular when the leaf is in dry condition, typical depression is noted by also by the author.